I sometimes rp as a vampire. It's by no means the only thing I do, but it's something that I do enjoy from time to time. I don't really like the mainstream myths about them though, I use the lesser known ones. I don't like that they burn in sunlight, it doesn't make much sense to me. I just make my character pale and force them to burn in sunlight instead of tan. I think that depending on the story, what drives vampires to take blood is interesting. I like the idea that they need it to survive and that without it, they sort of starve in a way, but I like the more Celtic version that there's a monster deep in them. Even if a vampire is nice and sweet and stays away from people to avoid hurting them, that they need to suppress the part of them that makes them a vampire, but they can't do it forever.